<template>
    <div>
        <input type="button" value=" +1" @click="addNum"/>
        {{num}}
       <input type="button" value=" -1" @click="subNum"/>
    </div>
</template>
<script>
export default { 
    data() {
    return {  num: 0 };
},
    methods:{
        addNum(){
            this.num++;
        },
        subNum(){
            this.num--;
        },
    },
};
</script>
<style lang="">
    
</style>